* Sleep studies are complex: Studying sleep patterns in wild animals is challenging. It requires specialized equipment and observation techniques.
* Species variations: Different monkey species have different sleep patterns. Some might be more prone to deep sleep than others.
* Individual differences: Just like humans, individual monkeys have their own sleep preferences and habits.
While we don't have a specific number, we can say that monkeys do experience deep sleep. This is a crucial stage of sleep for all mammals, including monkeys, as it's important for:
* Physical and mental restoration: Deep sleep allows the body to repair and rebuild itself.
* Memory consolidation: It helps solidify memories and learning experiences.
* Hormone regulation: It plays a role in the release of important hormones.
If you're interested in learning more about monkey sleep patterns, you could search for research articles on specific species or consult with primatologists.